Resolve So many Fields in Store->Configuration->Catalog has no-validations (digit, greater than zero) issue 23721

Author: edenduong

app/code/Magento/AdvancedSearch/etc/adminhtml/system.xml

@@ -55,6 +55,7 @@
                     </field>
                     <field id="search_suggestion_count" translate="label" type="text" sortOrder="91" showInDefault="1" showInWebsite="1" showInStore="1">
                         <label>Search Suggestions Count</label>
+                        <validate>validate-digits validate-zero-or-greater</validate>
                         <depends>
                             <field id="search_suggestion_enabled">1</field>
                         </depends>

app/code/Magento/Catalog/etc/adminhtml/system.xml

@@ -41,9 +41,11 @@
                 <label>Recently Viewed/Compared Products</label>
                 <field id="recently_viewed_lifetime" translate="label" type="text" sortOrder="40" showInDefault="1" showInWebsite="0" showInStore="0" canRestore="1">
                     <label>Lifetime of products in Recently Viewed Widget</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
                 <field id="recently_compared_lifetime" translate="label" type="text" sortOrder="40" showInDefault="1" showInWebsite="0" showInStore="0" canRestore="1">
                     <label>Lifetime of products in Recently Compared Widget</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
                 <field id="synchronize_with_backend" translate="label" type="select" showInDefault="1" canRestore="1">
                     <label>Synchronize widget products with backend storage</label>
@@ -140,6 +142,7 @@
                 <label>Category Top Navigation</label>
                 <field id="max_depth" translate="label" type="text" sortOrder="1" showInDefault="1" canRestore="1">
                     <label>Maximal Depth</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
             </group>
             <group id="custom_options" translate="label" type="text" sortOrder="700" showInDefault="1" showInWebsite="1" showInStore="1">
@@ -158,6 +161,7 @@
                 </field>
                 <field id="year_range" translate="label comment" type="text" sortOrder="4" showInDefault="1" showInWebsite="1" showInStore="1">
                     <label>Year Range</label>
+                    <validate>validate-digits validate-zero-or-greater validate-number-range number-range-1000-9999</validate>
                     <comment>Please use a four-digit year format.</comment>
                     <frontend_model>Magento\Catalog\Block\Adminhtml\Form\Renderer\Config\YearRange</frontend_model>
                 </field>

app/code/Magento/Downloadable/etc/adminhtml/system.xml

@@ -16,6 +16,7 @@
                 </field>
                 <field id="downloads_number" translate="label" type="text" sortOrder="200" showInDefault="1" showInWebsite="1" showInStore="0" canRestore="1">
                     <label>Default Maximum Number of Downloads</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
                 <field id="shareable" translate="label" type="select" sortOrder="300" showInDefault="1" showInWebsite="1" showInStore="0">
                     <label>Shareable</label>

app/code/Magento/Reports/etc/adminhtml/system.xml

@@ -17,9 +17,11 @@
                 </field>
                 <field id="viewed_count" translate="label" type="text" sortOrder="20" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Default Recently Viewed Products Count</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
                 <field id="compared_count" translate="label" type="text" sortOrder="30" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Default Recently Compared Products Count</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
             </group>
         </section>

app/code/Magento/Swatches/etc/adminhtml/system.xml

@@ -11,6 +11,7 @@
             <group id="frontend" translate="label" type="text" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="1">
                 <field id="swatches_per_product" translate="label" type="text" sortOrder="300" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Swatches per Product</label>
+                    <validate>validate-digits validate-zero-or-greater</validate>
                 </field>
                 <field id="show_swatches_in_product_list" translate="label" type="select" sortOrder="310" showInDefault="1" showInWebsite="1" showInStore="1" canRestore="1">
                     <label>Show Swatches in Product List</label>